I have been installed Omeka 2.4 on AWS free tier and upgraded to 2.5 recently. I am using EC2 and S3 for file uploads and RDS for database of AWS services for almost 1 year.
Throughout the 1 year, it runs ok. But sometimes I can not access omeka site. At first time, I have restarted EC2 instance. But I realize that I can not access when VolumeReadOps or VolumeWriteOps. See this. When this happen, there is no user on my omeka site.
I am wondering there is a background running IO process when Omeka is running on web server.
Thank you in advance.